若2x²+2xy+y²-4x+z-2√z-3 +2=0,求xy+yz+xz的值

若2x²+2xy+y²-4x+z-2√z-3 +2=0,求xy+yz+xz的值. 若2x²+2xy+y²-4x+z-2√z-3 +2=0,求xy+yz+xz的值 1.已知3x-4y-z=0,2x+y-8z=0.求x²+y²+z²/xy+yz+2xz 的 若x/3=y/1=z/4,且xy+xz+yz=76,求2x²+12y²+9z²的值 若X/3=y/4=z/5,且xy+yz+xz=94,求代数式2X²+12y²+9z² 的值 已知x：y：z=1:2:3,且xy+yz+xz=66,求2x²+12y²-9z²的值. 已知4x-5y=2z=0,x+4y-3z=0.求x²+y²+z²÷xy+yz+xz的值. 已知x/3=y/4=z/6,(x,y,z≠0),求xy+yz+xz/x²+y²+z² 若x:y:z=2:(-3):4,则x²+y²+z²/xy+yz+zx的值为 已知x/3=y/1=z/2,且xy+yz+zx=99,求2x²+12y²+9z²的值 已知3x-4y-z=0,2x+y-8z=0,求x²+y²+z²／xy+yz＋2zx的值 若x/3=y=z/4,且xy+xz+yz=76,求2x*x+12y*y+9z*z的值